Street and road construction.



l J. M. GOSGROVE. T

STREET AND ROAD CONSTRUCTION.

APPLIOATION FILED JUNE 16, 1913.

1,078,773, Patented Nov.18,1913.

W'TNEEYEEE': l INVE-rc entren sterne inirnnr nesten IJ'AMSAM.' COSGROVE, 0F MALEDEN, MASSACHUSETTS.

STREET AND .RAD COSTRUCTIQN.

Specification of Letters Eatent.

Patented N ov. 18, 1913i 'Application filed June 16, 1813. Serial No. 773,8i6.

`Be it known that l', JAMES M. Cosonovn,

a citizen of the United States, residing in Melden, county ltiiddlesex, and State of construction, and more particularly to streets or roads of that character in which the wearing surface is composed of blocks-of granite, `wood or other materiel.

Roads or streets provided with a surface or Wearing layer oi the character described are not entirely satisfactory, owing yto the feet that the individuel blocks are capable of being moved by heet and cold,- so that in :t short time they are disturbed and moved into oilie'fcnt positions and thereby form a very irregular or rough surface, which is highly objectioneble end. hes to be releid at risquent intervals.

f prefent invention has for its object "idc e. surf-fece or vWeeriiog layer of ini blocks or rigid. members, which are against movement, es `will be deand which een laid in minimum et :i minimum epense. To this end, in, blocks .fire individually inclosed in forms ulrich constitute part of the permeiient 4wei-ir 'j surface, and which are ,more or :idr ve and yielding for e' purpose, as will d. cribed The par i tnres oi' the invention xth e weeringleyer o* t e reed show-7n in n plan of one ot v iin the drawings es illustieting this nnfeiition" is provided' with wearing su ce or eyer, which is @exposed-of plurality of l d members or blocks o, lil/sh iney be granite, Wood, slag or other suit ne material, 'iii 'which are inclosed. except et their upper surface in e forni composed of side pieces oi" members o and 'e bottom piece or member o, of adhesive 'und yielding meleriel., piqeerebly sand or dust and asphalt in suite-ble proportions, for

Massachusetts, hsve invented an improve-- th's iro/vnitienw Fig.

instance, l5 to 25% asphalt and' 85 to 7 5% sand or dust, which mixture forms a body, which capable of being handled and yet is yielt ing and more or less adhesive under the influence of heat.

The side pieces or members Z) may be mede seperate 'from one another and from the bot tom member or piece c, so that they may be applied to each block a as the letter is'laid. The blocks a are usually rectangular in form and have substantially smooth feces, and the members or pieces o, c, are made rectangular in shape so that they een be tted to the blocks mand ineke close contact therewith. The bottom pieces ciney b e mede of substantially the same size es the bottom surface of each block, or, as is preferred, the bottom striptl may bei made long,` enough to extend across the roe-d or street is represented in Fig. l, and form the bottom strip for e row' of blocks a. The sidepieces may and preierably will be made of sucient height to project above the upperv or top surface of the blocks a, as represented at the. left in Fig. l, so as to 'form locking projections 1G, which are designed to be pressed down upon "and overlap onto the top surface of the blocks a and thereby securely lock the latter in the forni against tipping movement there in, es represented et the right in Fig. l, and thus avoid the granite or 'other block a from being tilted vabove the level 4of adjacent blocks.

The locking projections i() may berolled for pressed down with a heated tool, Weich will soften the asphalt sufficiently to enable the projections to' be spread over the edges of the block without separating from the portion of the members between the blocks, and when the blocks a have been thus locked, :t smooth or substantially smooth upper surfece is imparted to the Wearing layer of the street or road, se represented et the right in Fig; By ironing down the projecting ripper ends of the side members or strips b ofthe form, in the presence of heat, thel blocks e' ere not. only `locked in place, but the side members or strips are united at their upperedges so as to form a container or form having sides which may be separated at their edges between the blocks a, but are united at their upper-ends. Y

The Wearing surface or layer referred to, may be leid upon any suitable foundation, and, in the present instance, the foundation is represented es fcon'fiposed of e plurality lll) ` ef layers, vr'comprising a subgrade 20, a con-l cretef layer 2l, and a sand layer 22, but it is y not. desired .to limit the invention tothe lparticular fou-ndationherein shown. It ispreferred to make the strips or members b ofv adhesive material, suchv as asphalt, and

a borly of niinelyfdivided silicious material, such as sand, and insuch proportions that the stripsmay have suliicient rigidity to enable them to be easily handled and transported, yet possessing suicient plastic or .fadhesive material, such as the' asphalt, to

l f enable themvto be rolled down without separation of the Overlapping or locking edges from the portion of the strips between the blocks, and while I may .prefer to employ .the ngred-ients'of the yielding members in about'the'pro ',ortions speciiied', it is not desired to. lmiii'fthe :invention either tothe articular proportions or tov the particular ingredients specied.

' the blocks arcapahle of yielding more or. less and are united'at their upper'edges, i.

`lirom the above description, it will be seen that `the blocks a are locked against tilting or being thrownout 0f their Jtrue or proper position under ,the influence of. heat and,

cold, andi further that the forms containing the blocks and renders the streetl orr'oad sanitary and dustles's.

Claims. v

A1. In a construction of the character described, a wearing surface` composedyof a pluralitvl of Ablocks and strips composed` of silicious material and asphalt interposed be- -tween said blocks andhaving their upper ends loverlapping the same,isubstantially as f described.

2. In. a construction of theicharacter described, a Wearing surface. composed of a' 'plurality offblocks arranged in rows, a layer of silicious and yieldng material p upon Copies ofxli'is patentfniay-'he obtained which the blocks in a row are laid, and members of silicious and adhesive material interposed between adjacent blocks'and having their lupper' ends overlapping the upper surfaces ofsaid blocks.

` 3. In a construction of the character d escribed, a wearing surface composed of blocks, and yielding forms in which said blocks are located, said forms overlapping the said blocks and being vunited' at their upper edges which overlap the blocks, substantially as described.

4. In a constructiongof the character described, a -wearing surface composed of blocks, and forms in which said blocks are located, said forms being composed of side members of yielding and adhesive material united at their upper edges and separated at the lower 'portions of their side edges, substantial'ly as described.

5. -Ina construction of the character described, a wearing surface composed of rigid 'members and preformed yielding and ladhesive' members interposed between said rigid members and having their upper ends overlapping said rigid members to lock the latter in Xed position.

6... In a construction of the 'character described, a wearing surface composed of rigid ,members, and preformed yielding and adhesive members interposed between said rigid members and having their` upper ends united tegether, substantially as described.

7..,In a construction of the character described, a wearingvsurface composed of rigid members, and preformed yielding and adhesive members` interposed between said rigid members a single yielding member being common to two adjacent rigid members and separated at the lower portion of its side edges from an adjacent yielding member but'unitedthereto at the .upper portion of its side edges.

In testimony whereof,- Il have signed 4my name to this'specificatin inthe presence of two subscribing witnesses.

. JAMES M, .COSGROVE Witnesses.:

for ve cents each, by addressing ,Washingtonyk C.

.' JAS. H. CHURCHILL,

J. MUnPHr the Commissioner of Patents, 

